{"id":"CVE-2026-102407","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-102407","generatedAt":"2026-10-27T23:45:11.021Z","title":"Incorrect Authorization (CWE-863) in Elasticsearch can lead to unauthorized data stream modification via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1).","description":"Incorrect Authorization (CWE-863) in Elasticsearch can lead to unauthorized data stream modification via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). An authenticated user with sufficient privileges over a single resource could use the Modify Data Streams API to modify a data stream to which they were not otherwise authorized, potentially injecting data into it or affecting its ability to be searched normally. This issue does not allow an attacker to read the contents of a data stream they do not otherwise have access to.","published":"2026-10-06T20:17:13.000Z","lastModified":"2026-10-13T18:48:50.000Z","status":"Analyzed","sourceIdentifier":"security@elastic.co","cvss":{"version":"3.1","score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L"},"cwe":["CWE-863"],"affected":["elastic/elasticsearch"],"epss":{"score":0.00219,"percentile":0.12253,"date":"2026-10-26","history":[{"date":"2026-10-07","score":0.00218,"percentile":0.11261}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-06T20:17:13.000Z","detail":{"score":"5.4","severity":"MEDIUM","publishedAt":"2026-10-06T20:17:12.647Z"},"summary":"New CVE, medium severity (CVSS 5.4)."}],"references":[{"url":"https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-188/390861","tags":["Vendor Advisory"],"source":"security@elastic.co"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-102407","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}